#!/bin/bash
#############################################################################
#  Copyright (C) 2013-2015 Lawrence Livermore National Security, LLC.
#  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
#  Written by Albert Chu <chu11@llnl.gov>
#  LLNL-CODE-644248
#
#  This file is part of Magpie, scripts for running Hadoop on
#  traditional HPC systems.  For details, see https://github.com/llnl/magpie.
#
#  Magpie is free software; you can redistribute it and/or modify it
#  under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  Magpie is distributed in the hope that it will be useful, but
#  WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#  General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with Magpie.  If not, see <http://www.gnu.org/licenses/>.
#############################################################################

# This script is the core upgradehdfs script.  For the most part, it
# shouldn't be editted.  See job submission files for configuration
# details.

source ${MAGPIE_SCRIPTS_HOME}/magpie/lib/magpie-lib-paths

# This is a job, no loading export files or libs except for minimal convenience ones

cd ${HADOOP_HOME}

hadooptmpdir=`${hadoopcmdprefix}/hdfs getconf -confKey hadoop.tmp.dir 2> /dev/null`

currentnamenodepath="${hadooptmpdir}/dfs/name/current"
previousnamenodepath="${hadooptmpdir}/dfs/name/previous"

# The fact we are in this script means we are out of safe mode.
#
# So we need to finalize the upgrade and wait for the previous name node data to be deleted.

# Wait for the previous namenode data path to be created if it hasn't been created yet
while true
do
    if [ -d ${previousnamenodepath} ]
    then
        break
    fi
    echo "Previous namenode directory ${previousnamenodepath} not seen, sleeping 60 seconds waiting for it."
    sleep 60
done

command="${hadoopcmdprefix}/hdfs dfsadmin -finalizeUpgrade"
echo "Running $command" >&2
$command

echo "Sleeping 60 seconds to wait for finalizeUpgrade to complete"
sleep 60

while true
do
    if [ ! -d ${previousnamenodepath} ]
    then
        break
    fi
    echo "Previous namenode directory ${previousnamenodepath} still not deleted, sleeping 60 seconds waiting for it."
    sleep 60
done

exit 0
